A magician holds one six- sides die in his left hand and two in his right. what is the probability the number of dice in his left hand is greater than the sum of of the dice in his right. ...
Thursday, 7 August 2014
Tuesday, 15 July 2014
DATA SUFFICIENCY
1. What is the speed of the train whose length is 210 metres?
I. The train crosses another train (Howrah Express/12869) of 300 metres length running in opposite direction in 10 seconds.
II. The train crosses another train (Howrah Express/12869) running in the same direction at the speed of 60 km/hr in 30 seconds.
A. I alone sufficient while II alone not sufficient to answer
B. II alone sufficient while I alone not sufficient to answer
C. Either I or II alone sufficient to answer
D. Both I and II are not sufficient to answer
E. Both I and II are...
Sunday, 13 July 2014
IMPORTANT FORMULAS : PIPES AND CISTERN
Inlet:
A pipe connected with a tank or a cistern or a reservoir, that fills it, is known as an inlet.
Outlet:
A pipe connected with a tank or cistern or reservoir, emptying it, is known as an outlet.
If a pipe can fill a tank in x hours, then:
part filled in 1 hour = 1/x
If a pipe can empty a tank in y hours, then:
part emptied in 1 hour = 1/y
If a pipe can fill a tank in x hours and another pipe can empty the full tank in y hours (where y > x), then on opening both the pipes, then
the net part filled in 1 hour = (1/x - 1/y)
If a pipe...
Thursday, 10 July 2014
DATA SUFFICIENCY
1. What is the number?
I. The sum of the two digits is 8. The ratio of the two digits is 1 : 3.
II. The product of the two digit of a number is 12. The quotient of two digits is 3.
A. I alone sufficient while II alone not sufficient to answer
B. II alone sufficient while I alone not sufficient to answer
C. Either I or II alone sufficient to answer
D. Both I and II are not sufficient to answer
E. Both I and II are necessary to answer
Ans - C
2. What is the two-digit number?
I. The difference between the two digits is 9.
II. The sum of the digits...
Wednesday, 9 July 2014
TIME AND DISTANCE : IMPORTANT FORMULAS
Speed, Time and Distance:
Speed = Distance/Time
Time = Distance/ speed
Distance = (Speed x Time)
km/hr to m/sec conversion:
x km/hr = x X (5/18) m/sec.
m/sec to km/hr conversion:
x m/sec = x X (18/5) km/hr.
If the ratio of the speeds of A and B is a : b, then the ratio of the
the times taken by then to cover the same distance is 1/a : 1/b or b : a.
Suppose a man covers a certain distance at x km/hr and an equal distance at y km/hr. Then,
the average speed during the whole journey is: [2xy/(x + y)] km/hr.
...
Sunday, 6 July 2014
TIME AND WORK: IMPORTANT FORMULAS
Work from Days:
If A can do a piece of work in n days, then A's 1 day's work =1/n
Days from Work:
If A's 1 day's work =1/n,then A can finish the work in n days.
Ratio:
If A is thrice as good a workman as B, then:
Ratio of work done by A and B = 3 : 1.
Ratio of times taken by A and B to finish a work = 1 : 3.
...
Subscribe to:
Posts (Atom)